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DYNAMIC BEHAVIOR OF A PLANAR FLEXIBLE SLIDER CRANK MECHANISM WITH DIFFERENCE

LENGTHS

by

NURAIN BINTI ALIAS

Report submitted in partial fulfillment of the requirements for the degree

of Bachelor of Engineering

APRIL 2009

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ACKOWLEDGEMET

Alhamdulillah, I would like to express my grateful to Allah S.W.T. for giving me a good verve along this final year project. I also like to thanks to my family for giving me such off believe and support.

I would like to deliver my sincere thankful to all the classmate whom are very kind, helpful and conductive. Here by, highest respect and adoration special dedicated to my supervisor, Hafizawati binti Zakaria for teaching, leading, conducting, performing the excellent guidance along doing research final year project.

I would like to deliver my sincere thankful to Intan Maisara binti Abd Rahim and Mohamad Sulaiman Ibrahim , my companion struggle with writer in diligence to finishing this final year project for degree mechanical.

May it be all helped that give will blessing by Yang Maha Esa To want, Amin.

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APPROVAL AD DECLARATIO SHEET

This project report titled Dynamic Behavior Of A Planar Flexible Slider Crank mechanism with difference length was prepared and submitted by urain binti alias (Matrix umber: 061110873) and has been found satisfactory in terms of scope, quality and presentation as partial fulfillment of the requirement for the Bachelor of Engineering ( Mechanical Engineering ) in Universiti Malaysia Perlis (UniMAP).

Checked and Approved by

_______________________

(HAFIZAWATI BITI ZAKARIA) Project Supervisor

School of Microelectronic Engineering Universiti Malaysia Perlis

April 2009

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DIAMIK KETELETURA SATAH MEKAISMA GELAGSAR EGKOL

ABSTRAK

Projek ini adalah untuk mengkaji dan memahami kelemahan dinamik kelenturan satah mekanisma gelangsar engkol merujuk kepada perbezaan panjang engkol. Kaedah simulasi digunakan mengkaji kelenturan engkol. Bagi ujian simulasi, model engkol dilukis mengunakan perisian ADAMs dan SOLIDWORKs. Untuk melengkapkan model engkol ini, penghubung yang digunakan adalah model berdasarkan kepada fungsi hentakan. Ciri- ciri gerakan satah mekanisma gelangsar engkol adalah berdasarkan kepada tiga fasa iaitu gerakan bebas, penghubung gerakan berterusan dan gerakan hentakan. Dalam laporan ini, masalah bagi satah mekanisma gelangsar engkol iaitu dengan kakuan penghubung dan masalah kelenturan kakuan telah dikenalpasti dan dikaji. Daripada analisis yang dibuat didapati apabila ukuran panjang mekanisma gelangsar engkol bertambah maka kelajuan dan pecutan engkol adalah berkurang.

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DYAMIC BEHAVIOR OF A PLAAR FLEXIBLE SLID CRAK MECHAISM

ABSTRACT

This project is the study and understand of the dynamic behavior of a planar flexible slider–crank mechanism with different lengths. The simulation to used in study of the planar flexible slider–crank mechanism. For the simulation tests, we have built the model under the software ADAMS and Solidworks. We used a contact model based on the so called Impact-function. The motion is characterized by the occurrence of three phases: a free motion, a continuous contact motion and an impact motion. In this paper, the problem of the mechanism with rigid link and the case with flexible link were is detected and study studied. It is shown that when the slider crank lengths increase the velocity and acceleration is decrease.

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TABLE OF COTET

Pages

ACKOWLEDMET i

APPROVAL AD DECLARATIO SHEET ii

ABSTRAK iii

ABSTRACT iv

TABLE OF COTETS v

LIST OF TABLES vii

LIST OF FIGURES ix

LIST OF SYMBOLS, ABBREVIATIOS OR OMECLATURE xi

CHAPTER 1: ITRODUCTIO

1.1 Dynamic Behavior of a Planar Flexible Slider Crank Mechanism. 1

1.2 Management Research Principle K-Flow Chart 4

1.3 Problem Statement 5

1.4 Objective 6

1.5 Scope Of Project 6

1.6 Methodology The Motion Analysis 7

CHAPTER 2: LITERATURE

2.1 Introduction. 9

2.2 Mechanism 9

2.3 Law of motion 13

2.3.1 Newton’s Laws of Motion 13

2.3.2 The second law of motion 13

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2.3 Revolute Joint With Clearance 14

2.4 Flexible Slider Crank Mechanism 17

2.5 Effect of Crank Length 18

CHAPTER 3: METHODOLOGY

3.1 Introduction 21

3.2 ADAMs Software 23

3.2.1 ADAMs Benefits 25

3.2.2 ADAMs Applications 26

3.3 The Model and Description Part 31

CHAPTER 4: AALYSIS

4.1 Introduction 33

4.2 The Velocity 33

4.3 Acceleration 43

4.4 The Force 51

4.5 Stress 54

4.6 Natural frequency 56

CHAPTER 5: COCLUSIO

5.1 Summary 57

5.2 Recommendation For Future Project 58

5.3 Commercialization Potential 58

REFFERECE 59

APPEDICES

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LIST OF TABLE

Table o. Page

2.1 The model slider-crank mechanism and

the description. 10

3.1 Model and description the part. 31

4.1 The slider crank mechanism by part are

the velocity for 160.36mm steel material 36

the velocity for 160.36mm cast iron material 36

the acceleration for 160.36.mm steel material 44

the acceleration for 160.36.mm cast iron material 45

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4.13 The slider crank mechanism by joint are 52

the force for 160.36. mm

4.14 The slider crank mechanism by joint are

the force for 170.36.mm 53

4.15 The slider crank mechanism by joint are

the force for 190.36.mm 53

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LIST OF FIGURE

Figure Page

1.1 Slider crank mechanism model and major engine 2

1.2 Principal parts of slider-crank mechanism 2

1.3 Management research principle and connection literature, 4 K- Flowchart.

1.4 The motion analysis assembling sudsystem model 7

2.1 The type of revolute clearance joint 14

3.1 Flow chart methodology 22

3.2 The software analysis 23

3.3 General process simulation 24

3.4 The view interface 26

3.5 The procedures create link or part 27

3.6 The procedures create link or part 27

3.7 The suitable joint to used 28

3.8 The simulation control 29

3.9 The adams/ Postprocessor 29

3.10 The model to study 31

4.1 comparison graph difference length slider crank mechanism

steel material 41

4.2 The comparison direction velocity 42

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4.3 The comparison connecting rod at velocity 42

4.4 The comparison graph acceleration difference length slider

crank mechanism 50

4.5 The comparison between three model.( connecting rod

160.36mm,170.36mm and 190.36mm) 51

4.6 The graph are joint with element force 52

4.7 The location aspect high stress 54

4.8 The effective stress at crank part 55

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LIST OF SYMBOLS, ABBREVIATIOS OR OMECLATURE

F the mutual gravitational force exerted , one on the other.

m The mass of bodies .

a The acceleration of a particle .

σ Uniaxial stress

ωn The natural frequency

τ The time period of the system,

τ

d

K The stiffness coefficient